A coepobaticot



Jan. 3, 1928. 1,655,033

J. D. YODER APPARATus Foa TRENINO WATER FOR BOILER FEED AND OTHER PURPOSES lFiled July 1s. 1921 2 sheets-sheet 1 /NVENTOR A TTORNE Y Jem- 3, 1928.

1,655,033 J. D. YODER APPARATUS FOR `YTRRATVING WATER RoR BOILER FERRAND OTHER PURPOSES Filed July 15. 1921 2 sheets-sheer 2 ATTORNEY Patented Jan. 3, 1928 UNITE d'lfl".

.1S im.

JOSEPH I). YODER, F PHILADELPHIA, PENNSYLVANIA, ASSIGN TU COCHRANE COR- PORATION,` 0F PHILADELPHIA, PENNSYLVANIA, A CURJPDRA'EUN OF PENNSYL- VANIA. p

APPARATUS FOR TREATING- 'VATER FOR BOLEB, FEED AND OTHER PURPOSE Application led July 13,

My present invention consists in improved apparatus for heatingwater 'for boiler feed and other purposes. ln practice the apparatus may advantageously include provisions for not only heating` the water, but for subjecting the water to some hot process treatment as to deaerate the water, or both to deaerate it and soften it i as by the socalled hot process soi'teningtreatment7 and the general object ot my invention is to provide for the effective use of an economizer as the source et supply of all, or a large portion, oi theheat required in heating1 and treating the water.

A characteristic feature ot the invention is the use of an economiser divided into low and high temperature sections in association with a heat exchanger which serves to transfer heat to the water `entering` the low temperature section of the economiser trom the water leaving the low temperature economizer section. With this arrangement the water enters the low temperature section of the economiser at a 'temperature high enough to prevent siveating` and resultant corrosion of the economizer, and the water leaves the low temperature economiser section ata temperature high enough for eftective deaeration and hot process softening without requiring any or but little addi tional heat. The Water after traversing the heat exchanger the second timepasses to the high temperature section oit the economizer which it enters at a relatively low tempera ture conducive to etticient economizcr operation. y

Oi the drawings:

Fig. 1 is a diapgrannnatic representation ot one torm of my invention comprising hot process water softening and deaerating provisions; y

Fig. 2 is an elevation of a closed heat erchanger which may be used in lieu of the open heat exchanger employed in Fig. l; and

Fig. 3 is a diagrammatic representation of a form of my invention comprising1 pro visions for heating and deaerating water without othertreatment.

In the drawings, and referring lirst to the construction shown in l, A represents a water heater of the open feed water type which is mounted above and is open at its lower end to a decanting tank or settling `ehmnber 03g auch is employed in the 1921. crial'ltilo. 484,304.

called hot process ot water puriiication. A2 representsthe water inlet at the top of the heater A, and A the pipe through which steam may be passed into the heater under some conditions as hereinafter explained. The pipe A discharges into the heater through the usual` separator B provided with an outlet B for oil and other liquid separating trom the steam therein. The water entering' the heater at the inlet A2 passes through a distributing trough A3 and thence on to the usual splash trays A4'v over which the water flows in tilm-like and broken streams. A5 represents the service water outletv irom tank a, and AG is an overflow connection 'from the tanica. A7 represents an air vent from the heater.

The water outlet pipe A5 discharges into the chamber C oi an open heat exchanger C through a valve C2 controlled by a float C3 which opens and closes the valve C2 accordingly as the water llevel in the compartment C falls below orrises to a` predetermined maximum.` The heat exchanger C `comprises a second compartment C10 separated from the compartment C by a partition C11 which rises from the bottom ot' the heat exchanger to a height above the water level maintained inthe two compartments but does not extend to the top ot the heat exchanger so that the two compartments C and C are in full communication above the partition C11. The water enteringthe heat exchanger through the pipe A5 is advanta- `ageously discharged into the chamber C in a `spray onto bail-les or spreader plates C4. The

compartmentC is provided with a water outlet at its bottom connected by a pipe C*s to the inlet ot a pump E which discharges to the inlet ot the high temperature section `D2 of the economizer. The outlet pipe D20 'from the economiser section D2 may lead to a boiler or other apparatus in which the heatedV and treated water is utilized.

The raw water to be heated and treated l is supplied to the upper end oi the compartment C10 of the heat exchanger C through a pipe la". As shown the flow through the pipe F is regulated by a valve F controlled by a float A8 in the tank a, and the water supplied by the pipe F is discharged within the compartment C10 into a trough C from which it overflows on to battles or spreader plates @tot compartment @1G is `parte vided with an outlet at its bottom connected by a pipe C7 to the inlet oit a circulating` pump E. The latter discharges to the inlet ot the low temperature section D o'f the econoinizer. The outlet from the economiser section D is connected by a pipe D10 to the inlet A? oi' the heateil A. rl`he open heat exchanger@ is provided with an air outlet connection C8 shown as connected to a steam ejector Gr. Gr represents the steam supply line to the ejector G, and G2 the delivery pipe therefrom which leadsto the heater As shown the pipe A. may he supplied With exhaust steai'. from plant auxiliaries through a hranch pipe All which is provided with a cut-otr3 valve l. Live steam i may he supplied to the pipe A through a branch pipe A10 which includes an automatic pressure reducing` valve ll. A20 represents a branch ior dischaiging` excess steam to the atmosphere from thejpipe A through the usual back pressure valve l. y

ln the normal contemplated mode oic operation ot the apparatus shoun in Fig'. l` the ravv Water is supplied to compartment C10 of the heat exchanger C at a rate dependent upon the height of Water level in the tanl a, to which the lioat- A8 is responsive. The Water thus supplied to the compartment C1 is heated in its passage through the latter hy interiningling with steam supplied from the compartment C as hereinafter explained, and is augmented in amount by the water of condensation Jformed from the steam by which it is heated. tdvantageously the apparatus is so proportioned and operated that the Water Will leave the compartment C1" through the outlet C7 at a temperature somevvhat in excess ot 120 F.; say 132 F., so that the lotv temperature sectionD ot the leconoinizer will not he subjected to the sweating and consequent corrosion which 'would occur it the Water Were introduced. into the economiraer at a lower temperature. Advantageously also the apparatus is so proportioned and designed that the Water pass ing from the economizer section D through the pipe D10 to the chamherri will enter the latter at the temperature ot something like 220 li". which it is desired to maintain in the chamber A. lin case additional heat is' required, however, steam is supplied to the heater A. through the supply pipe A.

This'inay he exhaust steam furnished by the pipe All when exhaust steam is available tor the purpose,y and, when not7 it may he live steam supplied `from the pipe A10 through the pressure reducing;- valve H which may he setto admit steam to the pipe A Whenever the pressure in the pipe A is less than that corresponding to the temperature which it is desired to maintain in the heater A. llllhen exhaust steam is axailahle and is supplied in amounts in excess of the heater requirements the surplus is discharged through the branch A20 and hach pressure valve K .in the usual manner. The hot water softening apparatus a operates in the usual manner Which is too Well known to require descrip tion and the sottencd Water l through the outlet A5 at a ten'iperature oit say 215c F. slightly lower than the ten'ukierature maintained in the heater chamber il.. This Water after leaving the tank o is subjected to a reduction in pressure on its admission to the compartment C t the heat exchanger C and in consequence a portion ol' the water hursts into steam with a consequent reduction in its temperature to that corresponding to the tempcrilituic ot steam at the pressure existing in the heal' exchanger (l. 'lhis temperature will he that :it which thc 'atcr leaves the compartment C10 through the outlet C7 and that at which the water leaves the compartment C through the pipe C".

The hulk of thc air or other gases contained bjr the raw water entering the coinpartinent C oi the heat exchanger will lic liberated log1 the heating' to which the u'alcr is subjected While lloiviug in lihn-lile and hroleii stiean'is 'from the trough C ono and over the l itlles Ct. rlhe air and gases thus liberated and the air and gases liberated from the water passing` through the compartment C and Which in such pas g'c is 'lrccil troni all hut minute traces ol'i air and gas, are Withdrawn from thc heat exchanger liv the ejector G and 'forced into 'the chainlier A.. T his air and gas, and air and gases liberated from the 'Water in the heater 1li and tank a, are discharged 'from the hcatcr .l through thc vent,

The apihiaralus shown in Fig. l azul opceatcd as shove rlcfa'i'ihed pofsu-scs nsouci'oinf advanta es. llt provides relatively simple and elieftivc means for sfiificninu and floaeratina' the 'water with the aid ot heal l`urnished 7'\vlioll v, or mainly. h v the ccononliacr. The Water if Supplied lo thc lors li-inpeialuro economiser section il at :i tcniperaliuc hiuh enough as alrcadjj,7 explained lo avoid sweat-- ing and corrosion trouhlcs. and at a` tcm-- perature lov? ciiougijh Yfor thc olluclivc utilization ot the relativelyv low temperature gases h v which this` ,section ot the cconoiniz/.m' would oidinaril;Y he heated.. l-`|u'theriuorc the reduction in temperature olA the unici" supplied to the h' fh temp-eralure section il" ot the economiser ironi the lcuilicratui'e rcquired `for etlective tleai:`'aliou cud purilica tion augmente the capacii'v ot the hio'li teinperatuie economirfzer section lflf to tranffiuil heat from the gases passinoover it into thc Water passing)Y through it. The practical ciliciency ot' an ccononiizer, :is is uell known. decreases inarkedlj.7 with a relativeliv slipht increase in the temperature :1li which thc Water enters the econouiizei.

in lieu o' exchanges C shown in l heat icui'cs the tank o lll llo

l Ill lao A CJ

exchanger such as the tubular heat ex changerCA shown in Fig. 2.` The water delivered to the heat exchanger CA through the'pipe A5 and passing from the heat exchanger to the pipe C5 running to the high temperature economiser section, flows through the tub-es C12 of the exchanger, while the raw water supplied by the pipe F passes from `the latter through the intertube space of the exchanger to the pipe C7 running to the low temperature economiser section. The use ot the closed heat exn changer CA shown Vin Fig. 2, will give much the same advantages so tar as the economizers are concerned, which is obtainable with the o nen exchanger C shown in Fig. l; but with die closed heat exchanger, the deaeration must all he accomplished in the heaterchamber A and tank a and is less effectively performed than with the apparatus shown in Fig. l.

The water may be effectively deaerated, and the same economiser advantages attained as with the apparatus of Fig. l, without subjecting the water to a softening process, by means or the apparatus shown in Fig. 3. The last mentioned apparatus differs from the apparatus shown in Fig. l essentially only in that it does not comprise the softening apparatus A-a and has the outlet pipe D10 from the low temperature economizer section D connected directly to the inlet valve C2 in the compartment C of t-he heat exchanger C.

While in accordance with the provisions of the statutes I have illustrated and described the best forms ot my invention now known to me, it will be apparent to those skilled in the art that changes in form may be made. without departing -from the spirit of my invention as set forth in the appended claims, and that certain features of my invention may sometimes bc used to advantage without a corresponding use of other ifeatures.

Having now described my invention what I claim as new and desire to secure by Letters Patent, is:

l. The combination with an economizer divided into low and high temperature sections of a heat exchanger and provisions for passing the raw water through the heat exchanger to the low temperature section ot the economizer and from the latter again through the exchanger and thence to the high temperature section of the economiser and means for utilizing the heat contained in the water leaving the low temperature section of the economiser in eliminating air from the water before passing it to the high temperature section of the economizer.

2. The combination with an economiser exchanger comprising two separate water holding compartments open at their upper ends to a common steam space, of means for passing water in divided streams through one of said compartments and thence to the inlet for the low temperature economizer section, and from the latter through the other compartment of the exchanger in divided streams, and thence to the inlet of the high temperature section of the economizer.

3. The combination with an economizer comprising a low temperature section and a high temperature section of an open heat ex changer' comprising two separate water holding compartments open at their upper ends to a common steam space, of connections for passing water through one of said compartments and thence to the inlet for the low temperature economizer section and from the latter through the other compartment of the exchanger and thence to the inlet of the high temperature section of the economizer, and vacuum creating means connected to the heat exchanger for ywithdrawing air therefrom.

it. rlhe combination with hot process water treating apparatus of an economizer comprising low and high temperature sections, a heat exchanger, and connections tor passing the water treated through the heat exchanger, the low temperature section of the economizer, said apparatus, the heat exchanger and the high temperature section of the economizer in the order stated.

5. The combination with hot process water treating apparatus oi an economiser comprising low` and high temperature sections, a heat exchanger, connections for passing the water treated through the heat exchanger, the low temperature section of the economizer, said apparatus, the heat exchanger and the high temperature section of the economizer in the order stated, said heat exchanger comprising two water con1- partments and a common steam space to which both compartments are open, and means including air exhausting provisions for maintaining a pressure in said steam space appreciably less than the pressure to which the water is subjected in said ap ,aratus 6. The combination with hot process water treating apparatus, ot an economizer comprising low and high temperature sections1 heat exchanger, connections for passing the water treated. through the heat ex changer, the low temperature section of the economiser, said apparatus, the heat exchanger, and the high temperature sectionV of the economiser in the order stated, and means for supplying additional heat to the water in said apparatus.

Signed at Philadelphia, in the county of Philadelphia and State of Pennsylvania, this seventh day of July, A. D. 1921.

` JOSEPH D.. YODER.. 

